Electrical warp stop-motion.



I Patented Aug 29, |899. w. H. BAKER & F. E. 'KIP.

ELECTRICAL WARP S'I 'OP MOTION.

(Application filed Oct. 25, 189B.)

2 Sheets-+Shpet I.

(-No Modl.)

dlg/ENTORS nonmsv WITNESSES: fi

No. 632,004. Patented Aug. 29.] I899.

W. H. BAKER & F. E. KIP. ELECTRICAL WARP STOP MOTION.

iApplication filed on. 25. 1898.;

(No Model.)-

ATTORNEY 2 Sheets$heet 2;

- 5 the shunt device.

UNITED? STATES PATENT 1 Gimme.

WILILIAM n. BAKER, or CENTRAL FALLS, nnonn ISLAND, ANDQIFREDERIO E. K11, or. MONTOLAIR, NEW JERSEY, Assmnons TO THE KIP-ARMSTRONG COMPANY, OF NEW YORK.

ELECTRICAL WARPSTOP-MOTIbN.

SPECIFICATION forming part of Lett rs Patent No. 632,004, dated August 29', 1899.

Application filed October 25, 1898. seria1No.694,soj'/. (No model.)

To all whom it may concern:

Be it known that we, WILLIAM H..BAKER, residing at Central Falls, Providence county, Rhode Island, and F EDER G'E. KIP, resid- 5 ing at Montclair, Essex county, New Jersey, citizens of the United States, have invented certain new and useful Improvements in Electrical l/Varp Stop-Motions, of which the fol-- lowing is a specification. The present invention relates to stop-m0- tions for warps, and notably forwarpson looms, and also to such stopmotions as are controlled by. electricity. In this class of warp stop-motions the electric circuit is closed 15 when a warp-thread breaks by the falling of a drop or circuit-closing device normally supported by the unbroken warp-thread. This closing of the circuit excites an electromag net therein, and the magnet acts through mechanical devices to stop the loom. The object of the present invention is in the main to simplify the'construction 0f the magneto-mechanical devices for stopping the loom and to provide for freeing the shipper- 'lever of the loom without disturbing the 5 ofa loom for weaving pile fabrics to'which the invention has been applied. Fig. 2 is a fragmentary plan of the mechanism seen at.

the left in Fig. 1.- Fig. 3 is a detail view of the preferred form of circuit-closing device. 40 Figs. 4 and 5' are similar views, on a larger scale-than'the principal views, showing the devices for freeing the shipper-lever in two diiferent positions, respectively. Fig. 6 is a rear view of the operating-magnet, showing 7 is a horizontal section taken in the plane indicated byline m i'nFig.4. I Referring, primarily, to.Fig. 1, avhich shows the parts of alooin merely irta diagrammatic 5o manner, W is the main-warpbeam,and 'w the main or back warps. P is' the pile-warp beam, and p the pile-warps. R are the let-off rolls or beams for the pile-warps. "It uare the take-up rolls or rods, (sometimes called monkey-tails) H indicates the usual hed-. dies-and harness for producing the shed. r 4 is the 'whip'-roll; L, the lay; S, the shipperlever; B, the breast-beam, and K the knockolf lever. All of these parts are common in looms in some form, andthey are indicated in Fig. 1 merely diagrammatically.

' G represents any form of generator of electricity, and c c thecondn'ctors of a.circuit supplied thereby. This is a normally-open circuit adapted to be closed when any warpthread breaks by the falling of a -metallic drop normally supported by the said warpthread upon a terminal of said circuit. In Fig. 1 three sets hr series of these drops are shown at D mounted on the threads of the 7c main or back warps, and at E two sets of said drops are shown mounted upon the pile-warps .at a point where these warps are brought to a horizontal position by transverse rods or rollerst and t". f 7 5 Fig. 3 illustrates the preferred form of contact-drop, terminals, and transverse warp supports. 1 is a terminal bar connected with the conductor 0, and 2 is a terminal strip mounted in the upper edge of the bar 1, but insulated therefrom. .3 is the drop, an elongated strip of thin metal, slotted to fit over or straddle the bar 1 and provided with an aperture to receive the warp-thread.

When the threadbreaks, the'drop 3 falls by gravity into contact-with. the strip 2, and beingnormally in contact with the bar 1 it thus closes thecircuit. The warp is supported adjacent to the drops by warp-supporting transverse bars 4. These have only a mechanical function.

The particular construction of drop, ters minals, and warp-supports above described,

and best illustrated in Fig. 3', are not herein specifically claimed, as they are described in another pending jointapplication made by us, Serial No. 690,398, filed September 7, 1898, nor is our present invention limited to this particular form of circuit-closing device.

When the circuit is closed by the breaking zoo of any one of, the warp-threads, an operating clectromagnet in the circuit is excited and acts through some going part of the loom, preferably the lay, torelease theshipper-lever and allow it to stop the loom. This ma netomechanical mechanism will now be described, with especial reference to the enlarged detail views Figs. 4 to .7. v

. lay L or other vibrating part of the loom is secured tappet, here shown as a bracket'lO, and a screw 11, set in the bracket as shown.

' In Fig.4 the lay is represented in. its advanced position as when beating up the weft,

and it will be noted that when in this position the end of the tappet-screw 11 will have advanced to a position above the extremity oi the arm 9-0E the armaturelever 9; but

when a warp-thread breaks and the circuit,

is closed through the magnet 5 the latter will instantly attract itsar'matnre 8, thus elevating the latter and the arm 9 to .the position seen in Fig. 5. Consequently at the nest beating-u p movementof the lay the tappetscrew 11 will strike the end of the lever-arm" 9, and, acting through the lever 9 and the frame of the magnet, press back the shipperlever S free from its retaining-shoulder 8, thus setting said'lever free, so that its spring is able to actuate it and stop the loom. In

order that the blow on the end of the lever-arm S). imparted by the tappeton the lay may be transmitted directly to the frame .6 and the shipper-lever, the armature-lever is made to heat at 9 on the face of the frame 6, when the armature is attracted, as seen in Fig. 5, where the lever 9 and frame 6 are represented in section. Fig. 7 shows the forked construction of the lever 9 very clearly.

In this class of device it is very desirable that the momenta drop falls-and: closes the circuit through the operating-magnet 5 the movement of the armature-lever. 9 shall opcrate a shunt to shunt out the drops-in order that thecircuit may not be again broken at the drops by the vibration of the loom before.

the lay can have time to act. Such a shunt device is herein shown and will now be described. 1

The operating-magnet has at'its back Fig. 6, three binding-posts 12, 13, and 14. The coils of the magnet terminate, respectively,

at the posts 12 and 13 and connect electrically at these posts with the conductors c and 0 respectively. A shunt-conductore, connect:

ed to the binding-post 14, is adaptedtc shunt out the drops and their terminals 1 and 2 when electrical communication is established between the binding-posts rattan. This.

shunting'is elfeotedwhen'the circuit is closed through the magnet 5 by means that will now be described Connected with the bindingpost leis-a contact-piece l5, and connected with the binding-post 13 is aspring contact piece or blade 16, which is normally'nearly in contactwith the piece 15. The blade 16 is curved outward toward its free end. I On a rearwardly-extendingarm 9 on the armaturelever 9 is a stud 17, the end of which is adapted to wipeover the curved part of the blade-contact 16 when the armature of the magnet is attracted, and thus press this blade-contact against the contact 15, thereby shunting the circuit. V

Inlooms of the character'herein illustrated the pile-warps p are carried up from the rolls R on a steep incline to the take-up rods or rolls u u, and the pile-warps are let ofl intermittently to an extent suflicient to provide enough of the warp to float between the two back webs of the fabric. Hence special means must be provided in order to apply to these pile-warps the drops 3. The means herein -employed for this purpose consists of the two transverse'rods orrollers t and i, the former below the warps and the latter above the same. These rollers are so. disposed as to keep a We tion of the pile-warpssubstantially horizon tal, and beneath these warps and on the same 'levelas the roller 6 are the warp-supporting bars 4, which are placed between theseries of drops 3 and also between the drops and the respective rollers i and t. These supports serve to-uphold such a large proportion of' the length of the warps when they sag on be;

inglet oif that the drops do not descend lowenough to come in "contact with the terminal '2, Fig. 3.

Having thus described our -invention, we claim- 1-. In a warp stop-motion for looms for weaving. pile fabrios,-the combination withthe letoff rolls and take-up rods for the pile-warps, the former situated below and the latter above the main or back lwarps, means situated above the main warps for bending the pile-warps, for a portion of their length, into a substantially horizontal position, and a plurality of trans'versely-jeittendi-ng supports under this horizontal portion of the pile-warps,

of circuit-closingdrops arranged in series on the pile' warp threads .betweenfsaid supports,

a loom-stopping mechanism, an electriccin cuit adapted to be completed by the falling of anyone of said drops, agenerator supplying said circuit, an electromagnet in said circuit, and, means between said magnet and loom-stopping mechanism wherebyth'e latter is freed for operation by the excitationof said magnet, sufbstantially as set forth.

2. In a warp stop-motion for loomstor weaving pile fabrics, the combination witha series of ircuit-closing drops on the threads of the main'or back warps, of means foebend ing the pile-warps into a substantially horizontalposition, above the back warps, for a portion of their length, a plurality of transversely extending warp-supports under the whole ofi the' pile warps at this horizontal portion thereof, circuit-closing drops on the threads of the pile-warps and between said warp-supports, a normally open electric cirseveral-drops D and E, a loom-stopping mechsSI cuit adapted to beclosed by the falling of any one of the above-named drops when-its sup porting-thread breaks, a generator-which supplies said circuit, an eleetromagnet in said circuit, the loom-stopping mechanism, and

means between said magnet and loom-stopping mechanism whcreby the latter is freed for operation by the excitation of said magnet, substantially as set forth.

3. In a loom for weaving pile fabrics, the combination with the let-ofi rollsand take-up rods of the pile-warps, and means, situated above the main or back warps, for bending the pile-warps, for a portion of their-length,

into a substantially horizontal position, of a series of-eircuit-closing drops D, on the back warps, a series of circuit-closing drops E, on the pile-warps, at said horizontal portion of same, a plurality of supports extending under the pile-warps at the drops E, a normally open electric circuit including a generator and an electromagnet, said circuit being adapted to be closed by the falling of any one of the anism, and means between said electromagnet and said loom-stopping mechanism whereby the latter is freed for operation by the ex citation of said magnet,-substantially as set orth.

4. In an electric warp stop-motion for looms,

16 in position to be acted on by the stud 17 to close the shunt-circuit, substantially as set forth.

,5. Inawarp stop-motion for looms, vthe com bination of the following instrumen'talities;

namely: a series of metallic drops each having a thread-aperture, an elongated guideslot, and a contact projection between said thread-aperture and slot, an electric circuit having two terminals which extend through said guide-slots in the series of drops,-an electromagnet mounted on the shipper-lever'and in said circuit, said shipper-lever, the lay, and

means-whereby the shipper-lever is shifted to stop the loom by said lay, when the circuit is closed by the falling of one of said drops onto the upper circuibterminal, substantially as set forth.

In witness whereof we have hereunto signed our naines,'this 22d day of October, 1898, in the presence of two subscribing witnesses.

/ WILLIAM H. BAKER.

FREDERIC E. KIP.

Witnesses: v

HENRY CONNETT, PETER A. Ross. 

